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The following tables resulted from this classification : (a.) Cephalic Index.
Under 78 '5.
Over 78 -5.
Totals.
426 75
475 -75
902-5
_J
^2
-<1
Slow
519-25
571 -25
1090 -5
Totals
946
1047
1993
The correlation deduced from this table between ability as measured by the teacher and dolichocephaly is r = 0'0052 0-0240.
(b.) Length of Head. (Reduced to 12th year.)
Below 184'5 mm.
Above 184'5 mm.
Totals.
Intelligent
404-5
473
877-5
>,
IS <j
536
560 -5
1096 -5
Totals
940-5
1033-5
1974
The correlation, therefore, between short heads and ability is r = -0-0437 0-0242.
((.} Breadth of Head. (Reduced to 12th year.)
Below 145 mm.
Above 145 mm.
Totals.
k,
43
Intelligent
399-5
499
898-5
^
Slow
542
545-5
1087 -5
Totals
941-5
1044-5
1986
The correlation, therefore, between ability and broad heads is r = 0-0843 0-0240.
